<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索和添加商品区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query">
            <el-button slot="append" icon="el-icon-search" @click="searchGoods"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addGood">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- 商品表格区域 -->
      <el-table :data="goodsList" border stripe>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column
          label="商品价格(元)"
          prop="goods_price"
          width="110px"
        ></el-table-column>
        <el-table-column
          label="商品重量"
          prop="goods_weight"
          width="100px"
        ></el-table-column>
        <el-table-column label="创建时间" width="170px">
          <template slot-scope="scope">
            {{ scope.row.add_time | dataFormat }}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
            ></el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeGood(scope.row.goods_id)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页器区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 请求携带的参数
      queryInfo: {
        query: "",
        pagenum: 1,
        pagesize: 10,
      },
      // 商品数据
      goodsList: [],
      // 总条数
      total: 0,
    };
  },
  created() {
    this.getGoodsList();
  },
  methods: {
    // 请求商品列表数据
    async getGoodsList() {
      let { data: res } = await this.$http.get("goods", {
        params: this.queryInfo,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品列表失败！");
      }
      this.goodsList = res.data.goods;
      this.total = res.data.total;
      console.log(this.goodsList);
    },

    // 监听 pagesize 的变化
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getGoodsList();
    },

    // 监听 pagenum 的变化
    handleCurrentChange(newNum) {
      this.queryInfo.pagenum = newNum;
      this.getGoodsList();
    },

    // 删除商品
    async removeGood(goodId) {
      const confirm = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if(confirm !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      let {data: res} = await this.$http.delete(`goods/${goodId}`)
      console.log(res);
      if(res.meta.status !== 200) return this.$message.error('删除失败！')
      this.$message.success('删除成功！')
      this.getGoodsList()
    },

    // 根据输入的内容查询相应的商品列表
    searchGoods() {
      if(this.queryInfo.query.trim().length === 0) {
        this.$message.error('请输入要搜索的内容')
      }else {
        this.getGoodsList()
      }
    },

    // 添加商品
    addGood() {
      // 路由跳转
      this.$router.push('/goods/add')
    }
  },
  filters: {
    // 定义一个过滤器对时间戳进行处理
    dataFormat(originVal) {
      const dt = new Date(originVal);
      const y = dt.getFullYear();
      const m = (dt.getMonth() + 1 + "").padStart(2, "0");
      const d = (dt.getDate() + "").padStart(2, "0");
      const hh = (dt.getHours() + "").padStart(2, "0");
      const mm = (dt.getMinutes() + "").padStart(2, "0");
      const ss = (dt.getSeconds() + "").padStart(2, "0");

      return `${y}-${m}-${d} ${hh}:${mm}:${ss}`;
    },
  },
};
</script>

<style lang="less" scoped>
</style>